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Fraxinus latifolia (Oregon Ash)

Oregon Ash, Fraxinus oregona, Fraxinus pennsylvanica ssp. oregona

Fraxinus latifolia, Oregon Ash, Fraxinus oregona, Fraxinus pennsylvanica ssp. oregona, Deciduous Tree, Fall Color

Native to western North America, Fraxinus latifolia (Oregon Ash) is a magnificent, large, deciduous tree with a straight trunk and a dense, narrow crown. The foliage of compound pinnate, light green leaves contains 5-9 leaflets, which turn clear yellow in the fall. The young bark is thin, smooth, and gray-green, becoming gray-brown, thick and furrowed with age. In spring, before the leaves emerge, inconspicuous greenish male and female flowers appear in dense, glabrous panicles on separate trees. The female flowers are followed by dense clusters of hanging samaras, 2 in. long (5 cm), that ripen in fall. Long-lived (250 years), Oregon Ash is a splendid shade tree or specimen tree for a large landscape. Prized for its beautiful symmetrical shape, rapid growth, and hardiness, Oregon Ash has been widely planted as an ornamental tree and street tree. It is also excellent for revegetating wet, lowland areas. Birds and squirrels eat the seeds.

  • Grows up to 60-80 ft. tall and 50 ft. wide (15 m).
  • A full sun to part shade lover, this plant is easily grown in humus-rich, moist to wet soil soils. It survives standing water in winter months and, when established, need not be watered during the summer.
  • Perfect as a specimen plant.
  • Keep an eye our for caterpillars and scale insects, anthracnose, root rot, rust, sooty mold, and verticillium wilt. Not deer palatable.
  • Propagate by seeds sown outdoors after collection or stored and stratified, then sown in spring.
  • Native to California, Oregon, Washington, British Columbia.

Requirements

Hardiness 6 - 8
Climate Zones 3, 3A, 3B, 4, 5, 6, 7, 8, 9, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24
Plant Type Trees
Plant Family Oleaceae
Genus Fraxinus
Common names Ash, Oregon Ash
Exposure Full Sun, Partial Sun
Season of Interest Spring (Mid, Late)
Summer (Early, Mid, Late)
Fall
Height 60' - 80'
(18.3m - 24.4m)
Spread 40' - 50'
(12.2m - 15.2m)
Maintenance Low
Water Needs Average, High
Soil Type Clay, Loam, Sand
Soil pH Acid, Alkaline, Neutral
Soil Drainage Moist but Well-Drained, Moisture Retentive
Characteristics Showy
Native Plants United States, California, Oregon, Washington, Pacific Northwest
Tolerance Deer, Wet Soil
Attracts Birds
Garden Uses Ponds And Streams
Garden Styles Prairie and Meadow
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Alternative Plants to Consider

Fraxinus angustifolia ‘Raywood’ (Claret Ash)
Fraxinus americana (White Ash)
Fraxinus excelsior (European Ash)
Fraxinus ornus (Flowering Ash)
Fraxinus pennsylvanica (Green Ash)

Recommended Companion Plants

Pseudotsuga menziesii (Douglas Fir)
Pinus ponderosa (Ponderosa Pine)
While every effort has been made to describe these plants accurately, please keep in mind that height, bloom time, and color may differ in various climates. The description of these plants has been written based on numerous outside resources.
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Requirements

Hardiness 6 - 8
Climate Zones 3, 3A, 3B, 4, 5, 6, 7, 8, 9, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24
Plant Type Trees
Plant Family Oleaceae
Genus Fraxinus
Common names Ash, Oregon Ash
Exposure Full Sun, Partial Sun
Season of Interest Spring (Mid, Late)
Summer (Early, Mid, Late)
Fall
Height 60' - 80'
(18.3m - 24.4m)
Spread 40' - 50'
(12.2m - 15.2m)
Maintenance Low
Water Needs Average, High
Soil Type Clay, Loam, Sand
Soil pH Acid, Alkaline, Neutral
Soil Drainage Moist but Well-Drained, Moisture Retentive
Characteristics Showy
Native Plants United States, California, Oregon, Washington, Pacific Northwest
Tolerance Deer, Wet Soil
Attracts Birds
Garden Uses Ponds And Streams
Garden Styles Prairie and Meadow
How Many Plants
Do I Need?
Not sure which Fraxinus (Ash Tree) to pick?
Compare Now

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